Circuit breaker

Details Circuit breaker Circuit breaker

1981-06-10

1983-11-22

Shoop, William M.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 23, 335 35, H01H 7500, H01H 7700, H01H 7348

Patent

active

044172222

ABSTRACT:
An automatic switch of this type includes a switch latch for interrupting current, an overload tripping device and a short-circuit current tripping device for acting on the switch latch to trigger a current interruption. Generally there is also included at least one main contact device having at least one stationary contact and at least one movable contact, a movably supported contact lever attached to the at least one movable contact, and at least one arc quenching device associated with each main contact device. The improvement according to the invention includes a combination of an additional armature system having a magnet coil, a magnet core, a magnet armature and a striker pin. The striker pin is operable for directly striking the at least one movable contact lever and for lifting the at least one movable contact from the at least one stationary contact for a given limited time in the event of short-circuit currents, and the short-circuit current tripping device is in the form of a selective protection tripping device.

REFERENCES:
patent: 3467920 (1969-09-01), Hall et al.
patent: 4090156 (1978-05-01), Gryctko
patent: 4178572 (1979-12-01), Gaskill et al.
patent: 4215328 (1980-07-01), Chabot et al.

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